netdev - Re: GFP_ATOMIC page allocation failures.

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Message-Id: <20080402.114441.78726196.davem@davemloft.net>
Date:	Wed, 02 Apr 2008 11:44:41 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	kosaki.motohiro@...fujitsu.com
Cc:	akpm@...ux-foundation.org, csnook@...hat.com,
	davej@...emonkey.org.uk, nickpiggin@...oo.com.au,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	mchan@...adcom.com
Subject: Re: GFP_ATOMIC page allocation failures.

From: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Date: Wed, 02 Apr 2008 19:56:05 +0900

> 
> > ---------------------------------------------------------------------
> > We get rather a lot of reports of page allocation warnings coming out of
> > tg3.  But this driver is know to handle them properly so let's suppress
> > them.
> 
> BTW:
> other person's tg3 allocation failure bug report.
> 
> http://bugzilla.kernel.org/show_bug.cgi?id=9771

Yes, I know about it.  It will occur for any device
which must use linear RX buffers and supports
>PAGE_SIZE MTUs.

But modern chips are going to support segmentation of
receive packets into multiple individual pages and
therefore not have this order>0 page allocation
requirement.

That is my point.
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